9) Valvetrain noise can be reduced using O stiffer return springs O desmodromic valves Oa tappet O dual springs 10) Let the crankshaft of a 4-stroke engine be rotating at 1500 rpm. Then, the camshaft is rotating at O 6000 rpm О 750 грm O 1500 rpm О 3000 грm revolution(s) of the crankshaft in a 4-stroke engine. 11) The intake valve is opened once in every O one O two O three O four

9) Valvetrain noise can be reduced using O stiffer return springs O desmodromic valves Oa tappet O dual springs 10) Let the crankshaft of a 4-stroke engine be rotating at 1500 rpm. Then, the camshaft is rotating at O 6000 rpm О 750 грm O 1500 rpm О 3000 грm revolution(s) of the crankshaft in a 4-stroke engine. 11) The intake valve is opened once in every O one O two O three O four

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter33: Emission Control Systems

Section: Chapter Questions

Problem 1RQ: Explain why a small PCV valve opening is adequate at idle speed.

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Question

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9) Valvetrain noise can be reduced using
O stiffer return springs
O desmodromic valves
O a tappet
O dual springs
10) Let the crankshaft of a 4-stroke engine be rotating at 1500 rpm. Then, the camshaft is rotating at
O 6000 rpm
0 750 грm
O 1500 rpm
О 3000 грm
revolution(s) of the crankshaft in a 4-stroke engine.
11) The intake valve is opened once in every
O one
O two
O three
O four
dead centre.
12) The position of the piston when it is nearest to the crankshaft is referred to as the
O bottom
O top
O near
O far
volume.
13) The nominal volume of the combustion chamber when the piston is at the TDC called as
displacement
O total
O combustion
O clearance

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